waveguide

[ weyv-gahyd ]
/ ˈweɪvˌgaɪd /

noun Electronics, Optics.

a conduit, as a metal tube, coaxial cable, or strand of glass fibers, used as a conductor or directional transmitter for various kinds of electromagnetic waves.
Compare optical fiber.

Origin of waveguide

First recorded in 1930–35; wave + guide

British Dictionary definitions for waveguide

waveguide
/ (ˈweɪvˌɡaɪd) /

noun

electronics a solid rod of dielectric or a hollow metal tube, usually of rectangular cross section, used as a path to guide microwaves